While the groundwork was laid during the 1940s by President Franklin Roosevelt calling dissidents to his regime the “lunatic fringe,” this became a theme for the social sciences, the seminal study of which is The Authoritarian Personality by Theodor Adorno et al. This Zionist-funded study established an “F” scale in which respondents were tested for latent “Fascism.” The extent depended on their attitudes towards hitherto what was regarded as traditionally normative values, such as affection for parents and the family, the latter in particular regarded by these social scientists as the seed-bed of “Fascism.”
http://www.foreignpolicyjournal.com/2015/05/05/conspiracy-theory-as-a-personality-disorder/